Expatriates takes place in different settings across the world in the aftermath of a global economic collapse.  One thing that is very timely, considering the recent activities of ISIS, is an Indonesian Muslim attack on Australia and the Philipines, where we find several displaced American characters. Meanwhile, in the USA, a family in Florida struggles to survive and to help protect their small town against those desperate souls who would pillage it.

From Amazon:

Their America is gone forever

After the United States suffers a major socio-economic meltdown, a power vacuum sweeps the globe. A newly-radicalized Islamic government has risen in Indonesia and—after invading the Philippines, East Timor, and Papua New Guinea—sets its sights on Australia. No longer protected by American military interests, Australia must repel an invasion alone.